i18n: contextualize 'Guess case'
i18n: contextualize 'Add Cover Art'
i18n: change 'button' to 'button/menu', contextualize 'Add Release'
i18n: contextualize 'Reorder Cover Art'
i18n: contextualize 'Add ISRC' and 'Add ISWC'
i18n: contextualize 'Attach CD TOC'
i18n: contextualize the rest of the edit menu 'Add X'
MBS-5044: don't use absolute paths for favicon images
MBS-5044: migrate inline & non-background style images:

 * add_row.png
 * delete_row.png
 * guesscase.png
 * expand.png
 * collapse.png
 * up.png
 * down.png
 * track-up.png
 * track-down.png
 * mblookup-tagger.png
i18n: transifex stupidly merges some things, differentiating
Merge branch 'beta' into i18n-fixes-2012-10-07
i18n: switch to using two l() calls rather than an ln() to circumvent a gettext weirdness
i18n: pass 'View all ratings' through l()
MBS-4536: display cover_art_presence value in the webservice
MBS-4536: change to using <cover-art-archive><artwork> instead of simply <caa>
MBS-4536: add more stats to the CAA webservice stuff
MBS-4536: switch to bool_or rather than count, for correctness
MBS-4536: Add (usually not present) <darkened> element to XML output
MBS-4536: JSON Serialization for CAA data in release webservice
MBS-4536: don't use strings for booleans in JSON